I have a domain with a lot of content and it is an eCommerce site. I've just been told that we have another 12 domains that are inactive and do not redirect. I don't know what to do with them as they haven't been used for ages and do not direct or have any content (max of a DA or 4).
Therefore which is better for SEO? To have really good content with perhaps a few regular blog posts on each of the 12 domains, or to redirect all of the domains to the one main domain? I would take 1 domain and put a lot of content on and optimise is.. spending a few weeks on one and then move onto another, all while posting on each blog on each domain.
Thank you for any help! 
